Appliance for attaching edges of boards with dowels.



P. TRACY. APPLIANCE POR ATTAGHING BDGBS 0F BOARDS WITH DOWELS` APPLICATION FILI-TID MAR. 22, 1913. l 1, 100, 1 62. Patented June 16, 1914 ANIIED (DTFIC4 PAUL TRACY, OF LONDON, ENGLAND.

APPLIANCE FOR ATTACHING EDGES; OF BOARDS WITH DOWELS.

To all whom t may concern Be it known that I, PAUL TRACY, of 5 Castle street, City road, London, England, engineer, have invented a certain new and useful Improved Appliance for Attaching Edges of Boards with Dowels, of which the following is a specification.

rlhis invention relates to apparatus for joining boards by means of dowels of the type in which the means employed to resist pressure applied for the purpose of causing penetration yield when the penetration has been eifected.

Apparatus made in accordance with this invention is characterized in that the boards are propelled longitudinally of the machine after the penetration of the dowels has been effec-ted.

rlhe accompanying drawings illustrate one form of apparatus for this purpose, the boards being operated horizontally.

Figure 1 is a side elevation; Figs. 2 and 3 illustrate details more clearly.

1 is a frame or surface having a board 8 in position ready to receive the forward point of a dowel 2.

3 is a reciprocating fence receiving its movement from crank pin 4 in wheel 5 through the medium of the slide 6 and bar '7. This fence giving the forward movement to another board 9 exerting sufficient pressure to the same to move it into position and cause the dowel 2 to penetrate. For the purpose of obtaining resistance I provide another fence 10 attached to pitch chains 11, geared to wheels 12 and 13, fence 10 being capable of sliding from end to end of frame. 0n the shaft 1A carrying the wheel 12 is a brake drum 15, embraced by brake band 16, the initial friction of which is suflicient to cause enough resistance to the receding fonce to insure partial penetration of the dowels, brake resistance being applied by lever 17 from cam 32 on wheel 5 for the purpose of completing penetration.

18 (Figs. 1 and 2) is a magazine of dowels, one of which at a time is selected by groove-ended slide 19 rising from the bottom of magazine 18 and lifting a single dowel 2 into position, as shown, ready to penetrate the boards; lifting movement being imparted to said slide 19 by means of lever 2O through the medium of the slide rod 21 and angle bar 22, the lever 20 being Specification of Letters Patent.

Application filed March 22, 1913.

Patented June 16, 1914.

Serial No. 756,272.

actuated by crank pin 4. Angle bar 22 is temporarily supported in its elevated position by means of catch 23 which is adjustable in height for different thicknesses of board.

In order to cause the slide 19 to retire from its position supporting the dowel, so as not to impede the close approach of the board, the board 9 on touching the beveled face 19 on the said slide 19 and before it has time to grip it, causes the slide to act as a lever, its lower end pressing the angle bar 22 disengages it-from catch 23. The slide 19 then immediately drops to the bottom of the magazine 18 ready to select a fresh dowel 2 for the next operation.

For the purpose of maintaining a suiiicient pressure to the face of the boards to keep them in contact with the surface, I provide an arm 2a hinged at the end of the frame by joint 25 and pressed into Contact by the toggle lever 26 through the medium of connecting rod 27, the toggle 26 being actuated by foot lever 28 through connecting rod 29 thus affording a ready means of applying pressure, and relieving same to remove a linished panel, immediate self-adjusting pressure being applied continuously by the linked bar 30 and spring 31.

In the width of a machine, as described, any convenient number of magazines may be used, the slides of which can be actuated simultaneously from the saine angle bar 22. In some cases the drum 15 may be of such weight that its inertia shall give suiiicient resistance to cause penetration. Or, by increasing the pressure to the faces of the boards, enough resistance may be obtained by friction alone without the use of a receding fence and brake. An alternative form of magazine and selecting slide for dowels is shown in Fig. 3 for use in case of a machine on the same principle, but acting on boards placed vertically instead of horizontally, the slide being magnetized in order to support the dowel when protruded from the side of the magazine, no claim being made to magnetized dowel holders.

With apparatus made in accordance with this invention successive boards are propelled individually by a reciprocating fence or other means that will cause the rear edge of the advancing board to come to rest on the completion of each impulse in a position so that the rear edge is adapted to receive the forward ends of the dowels from the magazine.

What I claim as my invention and desire to secure by Letters Patent is l. Apparatus for oining boards by means of dovvels comprising a frame on which the boards to be joined are supported, means for holding one of the boards against pressure, means for traveling one of the boards toward the board that is held and means for placing dovvels between the boards to be joined and means for traveling the boards longitudinally of the machine in a forward direction after penetration of the dowels.

2. Apparatus for joining boards by means of dowels comprising a frame on which the boards to be joined are supported, a reciprocating fence, means for reciprocating the said fence, a receding fence, means for placing dowels between the boards to be joined, means for holding the receding fence against pressure, necessary to cause penetration of the dowels.

3. Apparat-us for joining boards by means of d ovvels, comprising a frame on which the boards to be joined are supported, a reciprocating fence, means for reciprocating said fence, gear Wheels, a pitch chain on said gear wheels, a fence on said pitch chain, and means for holding pitch chain during the period of time that the dowels are penetrat-ing the boards.

4 Apparatus for joining boards by means of do'wels comprising a frame on which the boards to be joined lare supported, a reciproeating fence, means for reciprocating said fence, a receding fence, a dowel magazine, a

groove ended reciprocating slide disposed in the magazine, means for reciprocating the slide, means for holding the receding fence against pressure, and means for permitting the receding fence to recede.

5. Apparatus for oining boards by means of dowels comprising a frame on which the boards to be joined are supported, means for holding one of the boards, means for traveling one of the boards toward the board that is held and means 'for placing dowels between the boards to be joined and means for traveling the boards longitudinally of the machine in a forward direction after penetration of the dowels and means for applying pressure to the surface of the boards to be joined.

6. Apparatus for joining boards by means of dowels comprising a Jframe on which the boards to be joined are supported, means for holding one of the boards, means for traveling` one of the boards toward the board that is held and means for placingdowels between the boards to be joined and means for traveling the boards longitudinally of the machine in a forward direction after penetration of the dowels and means for applying pressure to the surface of the boards to be joined, said means comprising a pivoted arm, a presser attachedv to the arm and means for moving the pivot'ed arm.

ln witness whereof, l have hereunto signed my name inthe presence of two subscribing witnesses'.

PAUL TRACY. Witnesses:

MILLm Dow S'ro'rr, ALFRED BEnsLEY CAMrBnLL.

Copies of this patent'may be obtained for ve cents each, by addressing the Commissioner of Patents Washington, D. C." 

